18334757. CLOSED LOOP STABILITY RAMP IMPLEMENTATION FOR CONSTANT ON-TIME BUCK CONVERTER (STMicroelectronics International N.V.)
Contents
CLOSED LOOP STABILITY RAMP IMPLEMENTATION FOR CONSTANT ON-TIME BUCK CONVERTER
Organization Name
STMicroelectronics International N.V.
Inventor(s)
Niccolo' Brambilla of San Donato Milanese (IT)
Valeria Bottarel of Novara (IT)
Stefano Corona of Borgarello (IT)
Fulvio Ottavio Lissoni of Cusago (IT)
CLOSED LOOP STABILITY RAMP IMPLEMENTATION FOR CONSTANT ON-TIME BUCK CONVERTER
This abstract first appeared for US patent application 18334757 titled 'CLOSED LOOP STABILITY RAMP IMPLEMENTATION FOR CONSTANT ON-TIME BUCK CONVERTER
Original Abstract Submitted
An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter, including: a comparator configured to compare a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in response to a rising edge in a comparator output signal, a pulse signal for controlling the Buck converter; a transconductance amplifier (TA) configured to generate, at an output terminal of the TA, a current proportional to a difference between a reference voltage and the feedback voltage; a capacitor coupled between an output terminal of the TA and a reference voltage node; and a ramp signal generator configured to generate the compensation ramp voltage by adding a voltage at the output terminal of the TA and a ramp voltage having a gradient proportional to a switching frequency of the Buck converter.
